Finnegan (4-6) took the loss in the first game of Saturday's doubleheader against the Mets but then recorded his seventh save of the season in the second game.
The Nats were in a 9-0 hole at one point in the matinee but managed to send the game to extra innings with a late rally, only for Finnegan to serve up a game-winning two-run shot to Francisco Lindor in the top of the ninth. The right-hander then bounced back in the nightcap, walking one and striking out two in a scoreless seventh inning to nail down a 4-3 win. Finnegan has fallen into the closer role for Washington but has mostly held up in high-leverage spots, posting a 1.50 ERA, 1.33 WHIP and 9:6 K:BB through 12 innings since the beginning of August while converting five of his six save chances.